CVE-2021-37963
CVE-2021-37963 is a medium-severity vulnerability in Google Chrome with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 4.3)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (61st percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Google Chrome
- Published:
- Last modified:
Description
Side-channel information leakage in DevTools in Google Chrome prior to 94.0.4606.54 allowed a remote attacker to bypass site isolation via a crafted HTML page.
Frequently asked questions
- What is CVE-2021-37963?
- Side-channel information leakage in DevTools in Google Chrome prior to 94.0.4606.54 allowed a remote attacker to bypass site isolation via a crafted HTML page.
- How severe is CVE-2021-37963?
- CVE-2021-37963 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
- Is CVE-2021-37963 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-37963?
- CVE-2021-37963 primarily affects Google Chrome. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-37963?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-37963 published?
- CVE-2021-37963 was published on 2021-10-08 and last updated on 2026-06-17.
References
- https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_21.html
- https://crbug.com/1199865
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
- https://www.debian.org/security/2022/dsa-5046
Affected products (5)
- cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
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